body {
    background: #EBEEF5;
    margin: 0px;
}

.allBg {
    margin: 0;
    width: 100%;
    height: 100vh;
    font-family: "Exo", sans-serif;
    color: #fff;
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

@keyframes gradientBG {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

#app {
    font-family: Helvetica, sans-serif;
    text-align: center;
}

.header {
    box-shadow: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px rgba(0, 0, 0, .04);
    border-radius: 6px;
    font-size: 24px;
    line-height: 60px;
}


/* 水平居中 */

.horizontal-center {
    margin: 0 auto;
}


/* 基本投影 */

.base-shadow {
    box-shadow: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px rgba(0, 0, 0, .04)
}